Enhanced Quadrupole Collectivity at N=40: The Case of Neutron-Rich Fe Isotopes

Journal Article · Fri Jan 14 00:00:00 EST 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.106.022502· OSTI ID:21532243

Rother, W; Dewald, A; Fransen, C; Hackstein, M; Jolie, J; Pissulla, Th; Zell, K -O ^[1]; Iwasaki, H; Baugher, T; Brown, B A; Gade, A; Glasmacher, T; McDaniel, S; Ratkiewicz, A; Voss, P; Walsh, K A ^[2]; Lenzi, S M; Ur, C A ^[3]; Starosta, K ^[4]; Bazin, D ^[2]

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1. Institut fuer Kernphysik der Universitaet zu Koeln, D-50937 Koeln (Germany)
2. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
3. Dipartimento di Fisica dell'Universita and INFN, Sezione di Padova, I-35131 Padova (Italy)
4. Department of Chemistry, Simon Fraser University, Burnaby BC V5A 1S6 (Canada)

The transition rates for the 2{sub 1}{sup +} states in {sup 62,64,66}Fe were studied using the recoil distance Doppler-shift technique applied to projectile Coulomb excitation reactions. The deduced E2 strengths illustrate the enhanced collectivity of the neutron-rich Fe isotopes up to N=40. The results are interpreted using the generalized concept of valence proton symmetry which describes the evolution of nuclear structure around N=40 as governed by the number of valence protons with respect to Z{approx_equal}30. The trend of collectivity suggested by the experimental data is described by state-of-the-art shell-model calculations with a new effective interaction developed for the fpgd valence space.

• OSTI ID: 21532243
• Journal Information: Physical Review Letters, Vol. 106, Issue 2; Other Information: DOI: 10.1103/PhysRevLett.106.022502; (c) 2011 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COULOMB EXCITATION
DOPPLER EFFECT
EXPERIMENTAL DATA
INTERACTIONS
IRON 62
IRON 64
IRON 66
NEUTRONS
NUCLEAR STRUCTURE
PROTONS
RECOILS
SHELL MODELS
SYMMETRY
VALENCE
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
DATA
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXCITATION
FERMIONS
HADRONS
INFORMATION
INTERMEDIATE MASS NUCLEI
IRON ISOTOPES
ISOTOPES
MATHEMATICAL MODELS
MINUTES LIVING RADIOISOTOPES
NUCLEAR MODELS
NUCLEI
NUCLEONS
NUMERICAL DATA
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES